Lines Matching refs:DCD
366 /* DCD/CTS and Rx/Tx errors */
443 /* ABORT: generated whenever DCD drops while receiving */
448 /* HUNT: software DCD; on = waiting for SYNC, off = receiving frame */
465 /* DCD: on = start to receive packet, off = ABORT condition */
468 if((changes & DCD) && !scc->kiss.softdcd) /* DCD input changed state */
470 if(status & DCD) /* DCD is now ON */
474 } else { /* DCD is now OFF */
866 if(scc->kiss.softdcd || (InReg(scc->ctrl,R0) & DCD))
867 /* DCD is now ON */
872 /* enable ABORT, DCD & SYNC/HUNT interrupts */
927 cl(scc, R15, DCDIE|SYNCIE); /* No DCD changes, please */
1122 * fulldup == 0: DCD is active or Rand > P-persistence: start t_busy timer
1215 * throw away send buffers if DCD remains active too long.